Water heating and circulating system



Nov. 10 1925..l 1,560,679

v W. s. ELLIOTT WATER HEATING AND CIRCULATING SYSTEM original Filed July 2, 1921 s sheets-sneek l fr =."2l`

INVENTOH.

Nov. 10,1925. 1,560,679

` W. S. ELLIOTT y LWATER HEATING AND CIRCULATING SYSTEM original Filed July 2, 1921 Aes sheets-sheet .2

Mm S. H .r

Nov. 10,v 1925 1,560,679 w. s. ELLIOTT WATER HEATING AND CIRCULATING v.SYSTEMl Original Filed July 2. 1921. 3 Sheets-Sheet 5 INVENTOR.

:Patented Nov.. 1Q, 1925.

' WILLIAM S. ELLIOTT, 0F PITTSBURGH, IPEININ'SYIILVAIWIA.y

' WATER HEATING .AN D CIRGULATING SYSTEM.

Application led July 2, 1921, Serial No. 482,279. Renewed March 18, 1984.

I To all facha/m, it may com'cm:

'Be it known that I, WILLIAM S. ELLIOTT,

a citizen'- of the United States, residing at Pittsburgh, in the county of Allegheny and Y State of Pennsylvania, have invented a new and-useful Improvement in Water Heating and Circulating Systems, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in which- Figure 1 is a View inside elevation, but largely diagrammatic, of a system embody-- ing my invention; and i i Figure 2 is a similar view of a the system on a larger scale.

Figure 3 is a view similar to Figure 1 but showing a modification.

My invention has relation to hot water eircuating systems for buimidings and is designedto provide a simple, eiiicient and economical system embodying therein the advantages of the invention described and claimed in my Patent No. 1,321,999, dated November- 18, 1919.

In the said patent I have described and claimed va method of vtreating water and other liquidsv for the removal of air and other contained gases in an effective manner. The present invention provides for the application of 'this method of treatment for the removal of air from 'water used, in hot water heating and circulating systems,

portion of thereby preventing corrosion .inthe pipes and fittings of the system.

, rIhe nature of `my invention will be best understood byreference'to the accompanyingdrawingsY inv which I have illustrated more or less diagrammatically one embodiment thereof, which will now be described, it being understood, however', that the invention is susceptible of various modifications inthe details of construction. arrangement and combination of the various parts without ,departing from the. spirit and scope thereof as Ydefined in the appended claims.` .I f

In these drawings the numeral 2 designates a water heater of any suitable or usual -l1aracter such, f or instance, as is employed '1n oliice and other bulldings for supplying water throughout th building. The water in, this heater may be vheatedbyv means of steam supphed through a connection such as indicated at 3.' v .y

4 designatesa preheater for the make-up or raw Water before it enters the circulating system, and 5 is a separator in which the air and other dissolved gases are removed. This preheater and separator may be of the form described in my said Patent No. 1,321,999. l

The cold raw Water enters the system at the connection 6 and first passes through the .condenser 7 having the connection 8 with the separator 5. In this condenser the Water` is heatedv to a certain temperature by the action of the steam and non-condensible gases which are drawn from the separator bythe Y action of an ejector 9. From the condenser 7 the raw water passes by the pipe 10 into 'the heater 4 under theV control of a loatoperated valve 11. lThe Water is further heat! ed in the heater by the action of exhaust steam, the main supply of which enters the heater through the connection indicated at l2, this connection preferably having a thermostatically controlled valve whereby the l temperature of thev watertin the heater-'may be maintained'substantiallyuniform. The water passes from the `preheater 4 to separator' through the connection 14 having a valve 15 controlled through connection 16 i operated by a float in the water chamber of theseparator.- The ejector 9 and condenser 7 operate to maintain a predetermined degree of vacuum in the separator whereby a v separation of the air and other dissolved gases contained in the water is eEected in the water is removed the into an elevated tank or reservoir- 20 which is preferably located at' or near the top of the building, or at least at aK suiciently great elevation to maintain a propercircnlation through the system. The discharge from the l connection 19 int the tank or reservoir 20 is controlled by a loated-operaalted yalve 21 so that a substantially constant quantity of Vwater will at all times be present in said reservoir. When the water inthisreservoir reaches a redetermined level, the Boat oper- .ates -to c ose the i vvalve 21 and` thereafter i. water in proportion to the amount which is consumed in the house system, this suppl dency' to accumulate in thisl tank and there.-

' by a pipe '24 leading to the inlet ofthe,

erably there should always be maintained al' cock 27 can be opened. .By this means 4and`- by `means of the valve 25,.the degree of `vacuum produced in the tankcanbe at all arat/or, it isthen advisable to maintain this -ris'ing in the pipe 22 being replacedu by the sorption mig t. increase the vacuum yin the tank above the desired point, and for, the

the'top floor-of a' building is limited. If

be regulated. at any time by. opening the valve 25 to the ejector 9.

28 designates .an exhaust steam connection thel pump 17 runs idly until such time that suiicient water has been' used in the .system 22 connectsthis tankl orv reservoir 20 with the heater 2. 23 is a down-comer pipe also connected to the reservoir 2 0 and having connections leading tothe .several floors of the building. As the waterin the riser vpipe 22, which is connected to theheater, is hotter than the .return water from 'the system,v an upward circulation is produced, the water may` also be utilized in the preheater. 41. In order to prevent the accumulation of air in the preheater 4, a vent is necessary. To prevent loss of Vsteam through-.this vent, 4I provide avent, which is indicated at 29,

througlian auxiliary condenser 30. This colder .water entering the house heater auxiliary condenser 30 is supplied withl coolthrough the A'pipe 23. f A continuous circulation thereforetakes place due to the difference in temperature of the Water in the pipes-22 and 23. .t dense'r to the heater. In this manner, any

From the foregoing it will be apparent steam escaping through this vent is utilized that the pump 17 will supply an amount of pipe 10 of the heater, there beinga water connected. by a pipe `with the outletor of yvater having been first passed v-throug vthe separator where'the air an-d'othergase's centaine-din such exhaust 'may' also be have been driven ofi', so that all .water travelutilized inthe auxiliary ing through the pipe 22 to the tank will be ing the .supply of water. oxygen and air `free and therefore will not .The operationl is as follows cause corrosion, even in iron pipes, when it reaches the distributing part-of the system. enters the condenser 7 at a temperature of VThe tank 20 is constructed to be as nearly 70 degrees Fahrenheit, and is used for conput the tank under. the action of ing Water by a branch 31 of the water inlet return connection 32 from the auxiliary conv thetank.V As above stated, this vacuumcan from the heater 2 to the heat chamber of the preheater 4, `whereby this-exhaust steam'v which leads from the top of the preheater 4,

inheati'nga portion of the supplyv water.

auxiliary condenser is also -preferably Assuming-'. that the raw or supply water 'y all tillt aSpOSSlble, but Should any air leak `(lensing the steam coming from .thgsepara--.

into -t byco'ntaminate the purified water. L'theregrecs." L 'Ihis'water so` heated: is delivered to fore, connect the upper portion of 4*this tank jegector 9 through the valve 25.' The pipe 24 is provided with .aa-vacuum gauge 26 and with a .petcock 27. This gaugewillindicate' temperature-immediately'drops vto a theamount of 'vacuum in the tank. "Prefnineteen inches of mercury, this .vacuum be'- vacuumof afew inches in this tank. By observingthis gauge any inltration'of air pump; into thejt'ank will bel indicated. Any air' or less'iby the purified water as oxygen-free water has a eat -aiiinity for air. This v'ab-- '1 may? 4be substantially;atmospheric, but is preferably a pressu're ycorres i vacuuin of. nineteen inches. vT e water flows. purpose of decreasing this vacuumthe petafromfthe ltank 20 :.down the down-comer 23 culating lsystemes fast 'as itis used.'l

In Figure 3 I .have shown' a 'modification which differs from .the system first described inl that the elevated. tank or reservoir is Qomitted, and thev pump v17a lis arranged to deliver the purified Water directly intothe ystem, preferably at the inlet of the heater 2*?.

The apparatus 4vtimes controlled.

The foregoing applies` particularly' to con ditions where the elevation of the tank above the elevation is suiiicient so thatthewater i' will il'ow to the top floor underfthe vacum' conditions such as are maintained in the 'septank under a vacuum equal to the vacuum in the separator, and thus reduce the amount ject -matter of my' divisional application, of` energy required to pump tliewater. into^Serial No. 688,464 l:tiled January251924.

" degrees, corresponding to a vacuum ofabout` at a pressure'. corresponding-to this nineteen.V

contained in the vtank will be absorbed more\ inches of vacuum/'and delivers ittothe tank [at the t-a'nlstv pressuref?. This ytank 'pressure' onding to and replaces'thewater already in thezcirherein disclosed `for effect- I ing the removal of the air, as adapted gen- 'erally todiierent systems, is made the sub- 'e' system, this air`would have atentor, the temperature of this water will be:v` raised. in', the 'condenser Afrom 15 7to 25 .d e- 100" the preheater flwhere ...its temperature -is raised 5to-say ISZ-I'deg'res `Fahrerilieitff. It then passes intol the separator f5, through tlie'control-valve described', whereu on this P kail'.tuner byfth'e' condenser The 'Hawkes' :this .wai-,gr ont o f circulation w;

The advantages vof m invention resultfrom the combination Wit a hot water heating and circulating system of the character described of 'efficient means for' removing .air from the lraw supply water before it enters themain heater. As more fully described in my saidv patent, the heat losses in the heater and `separator are comparatively small, andthe entire system rendered highly economical by the utilization to a maximum 4 extent of the 'exhaust heat for preheatingh the water in the preheater 4.

I claim:

l. A hot Water heating and circulating system, comprising a water heater, a source ofiwater supply for said heater, a preheater i for the Water, an air/separator into which the preheater discharges, and a pump vfor vtaking the purified water from the separator and delivering it to the system as required, substantially as described.y

2. A hot Water heating and circulating system, comprising a water heater, a/source of water supply'for said heater, a preheater for the Water, an. air separator into which the preheater discharges, an elevated reservoir connected to the heater, and a pumpy for taking-the purified water from the separator and delivering it to said reservoir, substantially as described. Y

3. A hot water heating and circulating system, comprising a water heate, a source of Water supplypforsaid heater, a preheater for the Water, an air separator into which the preheater discharges, an elevated reser- .voir connected to the heater, and a pump for taking the purified water from the sep-v arator and delivering it to said reservoir, together with means for exhausting air from said reservoir, substantially as described.

,4. A hot Water heating and circulating system, comprising' a Water heater, a source of Water supply for said heater, a preheaterfor the water, an air separator into which' the preheater discharges, an elevated reservoir connected to the heater, anda pump for taking the purified water from the separator and delivering it to said reservoir, together with means for exhausting air from said reservoir-and for regulating the degree of vacuum therein, substantially as described.

5. A fhot Water heating and circulating' system, comprising a Water heater, a source of Water supply for saidheater, al preheater for the water, an air separator into which thepreheater discharges, an elevated reservoir connected to the heater, and a pump for taking the purified Water from the separa- -t'or and delivering it tosaid reservoir, to-

-gether with means whereby substantiallythe' :same degree of vacuum may be maintained in both the separator and the reservoir, sub-l stantially as described.

J 9. A hot Water heat-ing A hm. wnfm heating and circulating` system,'comprising a water heater', a source y of water supplyfor said heater, a preheater forthe Water, an air separator into which the `preheater discharges, a\'steamd1iven pump for taking the purified Water from the separator and delivering it to the sys-- ftem, and means forconveying the exhaust tially as described.

8. A hot' Water heating andl circulating system, comprising a Water heater, a. source of Water supply for said heater, a preheater for the Water, an air. separator into vwhich the preheater discharges, and a pump 'for taking thepuried water from the separator,y and delivering it to said reservoir, said preheater havin "a vent and. a condenser through Whic the vent extends, said condenserl havingl a water return connection and circulating system, comprising a water heater, a source` v v water heater tothe preheater, substantially the preheater/ discharges, a condenser connected to theseparator, an ejector connected to the condenser, said preheater having a vent, an auxiliary condenser through whichg lthe vent leads, and a connection between the auxiliary condenser and the outlet of they ejector, substantially as described.

.11. A hotwater heating and circulating system, comprising a water heater, a source of water supply for said heater, a preheater for the water, an air separator intov which 'the preheatery discharges.v a condenser conl:nected to the separator, means for removing non-condensible. asesvfrom .the condenser, an auxiliary con enser, a vent leading from' the .preheater through the auxiliary .condenser,and a connection leading from the exhaust of said means to the auxiliary condenser, substantially as described.. Y

12: A hot water heating and circulating IOO system, comprising'a water h'eatfeig'u'a source;

of water supply :for saidheater,"a 'preheat'er for the Water, an airseparatorinto which the preheater discharges,` a 'condenser connected to the separator, an ejector` connected i. L13. A hot water heating .and circulating system, coi'nprisinga Water heater, a' source of Water supply" for said heater, a preheater for the water, vanairvsef)ara'tor into which 'the preheater discharges, a condenser. connected-'to the separator,'means fon removing nonfcondensible ases from the condenser,

an' auxiliary-,con enser, a vent lea-ding from;

Ithepreheater through the` auxiliary con- -v system, 'comprising a 'mainv 'waterfheatery means interposed 1n the 'water supplyfor-- said heater .for removing air jfrom the water.

supply to 4the heater, 'an elevated tank, a.

denser, and aconnection leading from the exhaust of said ymeans tto the auxiliary con-J denser, said` auxlhary condenser having awater return connection with the preheater, substantially as described.l f 14.1A hot water heating andjcirculatmg pumpifo'r delivering the puriedfwater to said tank, acirculating system connected toj said tank, and means for producing-'a con- .I trollable degreeof kvacuum in said tank,

f substantially as' described.

'A system, comprising a Water heater, a source- 15. vA hotfwa'ter heating and vcirculating of raw water supply for-'said heater, means through which :the supply waterpasses for removing air therefrom, an elevated tank or'.

reservoir, a-pumpy for delivering the Waterk from the air-extracting means to the said'` 14g tank or reservoir,and means for maintain? ing asubst'anti'a-lly constant volume of water 1n sald tank or 1re'servoir, substantially as 16. A hot water heating* and'circulating system, comprising a water heater, a source L of raw watersu ply -for said heater, means lthrough-'Which t ezsupply water-passes'for Y removing air therefrom, an elevated tank orl reservoir, a pump for delivering `-the water! from the air-extractingmeans "tothe said tank or reservoir, and means for maintain- A ing y2l.s'ubstantially constant volume of vvzgxterqv to 'said-heater, substantially as described.' 2 3'. The combination in a-hot'waterheaty ing-and circulating system, of a water heater .'fnslng-Lsteamas'aheating medium and having a" steam supply connectiom'said-,heater "havingfa'vent, anda 'heat exchanger in said in saidgtankfor.. reservoir, together-with' othexl meansfformaintaining11i-controllable degree *of vacuum msald ytank-or reservoinsub- Ist'antially asdescribed.

11A' het water mung ma kiifculauhg system, vcomprising a water heater, a source of water supply forfsaid heater, a preheater forj the water,' an air separator intowhichl 'the preheaterfdischarges, and a pump for agognato u taking the purified water from the separator; and dellvering it to the circulating system, substantially as described.

' 18. In a hot water heating and circulating system, means for removing air and other dissolved gases from the feed Water supplied to said system, comprising a heater, means for supplying heating steam to the heater,

an air vent leading directly from the heating chamberof the heater, and an auxiliary condenser through which the air vent extends, 4substantially as described.

dissolved `gases from thefeed Water supplied to-said system,.compris1ng a heater', means for Supplying heating .steam to thevhea-ter,

meansfor venting alr-` directly' from the heating chamber of the heater, andmeans for recovering and utilizing ,the heat carried dissolved gases from the feed waterisupplied means for; venting air fromf the lheating chamber of the heater, andv Ameans .for recovering andv utilizing the* heat' carried by 19. In a hot water heating'and circulating system, means for removing a1r -and other vvby the steam escaping with the air, substan-f .tially as described. '20, In a hot vvvaterheating'and circulating systempmeans for removingair and other' to said system,` comprising a heater, means for supplying heating"steam -.to n the heater,

the steam escaping with the air,'said means comprising an auxliarycondenser through which `the air-venting passage extends, and connections for Tleadmgggi the coolin .water through said auxiliary condenser an thence into the heater, substantiallyas described.

.- 21,; In `a vhot Water'heating and.v circulating .Y

systemfineans for removing air'and. other dissolved gases from the'fe'edwater suppliedy tosaidvv` system,said means comprising .a

heater for fthefee'd-. water, a steam supply connection'for the heater, means for ventm l I lthe heating chamberf Qfthev heater,v an

means'in lconnection with the venting means for utilizin .the vvheat .carried by the steam escapingr withl the-fair throughthe venting the heater, substantiallyas"described.

ing andcirculating system, o fa water heater.

uslng steam as a heating/medium andAhav-i the..:cofndensate" from saidimeans returning 22. The combination in ahjot water heat-l 'l 1 -means in vpr'eheating .the water supplied-tql.

vent, said AheatLexehanger lre turning its concharge of the ejector, substantially as described.

26. In a hot water heating rand circulating I system, a condenser, a steam-operated air e]ector for evacuatmg the condenser and discharging its steam and air into an auxi iliary condenser, said auxiliary condenser,

anda hot {vater heater having a Vent connected to the auxiliary condenser, substantially as described.

In testimony whereof, I have hereunto set my hand.

WILLIAM s. ELLIOTT, 

